A3 Mk2
| Diagram of coolant hose connections |
| 1 - | Expansion tank |
| 2 - | Coolant hose |
| q | From exhaust gas recirculation valve -N18- with exhaust gas recirculation potentiometer -G212- |
| 3 - | Exhaust gas recirculation valve -N18- with exhaust gas recirculation potentiometer -G212- |
| 4 - | Heat exchanger |
| q | If renewed, refill system with fresh coolant |
| 5 - | Gearbox oil cooler |
| q | Automatic gearbox only |
| 6 - | Coolant hose |
| q | To exhaust gas recirculation valve -N18- with exhaust gas recirculation potentiometer -G212- |
| 7 - | Coolant hose (top) |
| 8 - | Coolant hose (bottom) |
| 9 - | Radiator |
| q | Removing and installing → Chapter |
| q | If renewed, refill system with fresh coolant |
| 10 - | Engine oil cooler |
| 11 - | Thermostat housing |
| 12 - | Cylinder head/cylinder block |
| q | If renewed, refill system with fresh coolant |
| 13 - | Coolant pipe |
| 14 - | Coolant pump |
| 15 - | Intake manifold |
